any enlisted ladies?

So I'm considering enlisting in the military (not 100% sure on branch, but I have a good idea. Not important at he moment though) I'm aware that you can still take birth control, but I'm curious as to what the best kind to take will be. I have the bar now, but it doesn't help me keep active. I feel like it drags me down a bit. So I was wondering if there was a better kind of birth control, that won't completely drag me down. I even thought about switching to that 90 day pill, so that I can avoid my period while in basic. My problem is that I know they will switch me to the military approved kind, and I'm not sure I it's even allowed, so I need other opinions. (I'm currently a military dependent, so I know how to birth control process works. Just need options) ❤ Thanks ladies!